Measurements of densities, viscosities, speeds of sound and relative permittivities and excess molar volumes, excess isentropic compressibilities and deviations in relative permittivities and molar polarizations for dibutyl ether + benzene, + toluene and + p-xylene at different temperatures

Abstract

The densities ρ, dynamic viscosities η, speeds of sound u, and relative permittivities ε r, for (dibutyl ether + benzene, or toluene, or p-xylene) have been measured at different temperatures over the whole composition range and at atmospheric pressure. The mixture viscosities have been correlated with semi empirical equations. Calculations of the speed of sound based on Nomoto’s equation have been found to be close to experimental values for the three mixtures and at two temperatures. Excess functions such as excess molar volumes V m E, excess isentropic compressibilities κ s E, deviations in relative permittivities δε r, and molar polarizations δP m were calculated and fitted to Redlich–Kister type equations.